Field perpendicularity and distance surveying and mapping device for construction engineering cost

Abstract

The invention relates to the field of constructional engineering, in particular to an on-site perpendicularity and distance surveying and mapping device for constructional engineering cost, which comprises a surveying and mapping device main body, an angle adjusting assembly and a plurality of supporting assemblies, the top end of the surveying and mapping device main body is rotatably connected with the angle adjusting assembly; cleaning liquid is stored through the liquid storage tank, the angle of the surveying and mapping equipment is manually adjusted during cleaning, the bottom end of the surveying and mapping equipment abuts against the spring energy accumulator and applies pressure, the liquid is squeezed to the reverse telescopic rod, the driving sleeve and the swing arm are pushed to move, and the cleaning brush disc gets close to the lens and abuts against the lens; the micro motor is started to drive the cleaning brush disc to rotate to clean the lens, waste liquid flows into the flow guide groove through the inclined groove to be discharged, complex operation is not needed in the mode, cleaning can be completed when the angle is adjusted, scale can be rapidly removed, clear imaging is guaranteed, surveying and mapping errors are reduced, efficiency and data accuracy are remarkably improved, and the problem that the lens is inconvenient to clean is solved.

Description

Technical Field

[0001] This invention relates to the field of construction engineering, and more specifically to a device for on-site vertical and distance mapping of construction engineering costs. Background Technology

[0002] A building surveying system for construction engineering, application number CN116858200B, includes: a support frame for placement on the ground; a column vertically mounted on the support frame; a support base vertically slidably connected to the column; a rangefinder positioned at the four corners of the support base and used to illuminate the corner lines formed by the building walls; the rangefinder is rotatably connected to the support base, and an angle displacement sensor is provided on the lower end face of the rangefinder for displaying the angle between two adjacent rangefinders; and a display screen for displaying the measurement values ​​of the rangefinder and the angle displacement sensor. This invention has the following advantages and effects: by measuring the distance and angle from a fixed point to a corner line, the entire space area is divided into multiple triangles. The area of ​​each triangle is quickly calculated using the law of cosines, and the triangles are summed to obtain the total area. This allows for rapid and accurate surveying of the interior area of ​​irregular quadrilateral buildings.

[0003] In the prior art, including the aforementioned patents, lens cleaning of surveying equipment is a crucial step affecting surveying accuracy and efficiency. Traditional surveying devices often lack a dedicated integrated cleaning structure. When the lens becomes contaminated with dust, stains, or other debris, operators must pause the surveying work and manually wipe it with cleaning cloths, cleaning agents, and other tools. This cleaning method is not only cumbersome, interrupting the surveying process and affecting work progress, but also inconvenient to carry cleaning tools in complex environments such as the field. Improper handling during cleaning may scratch the lens, affecting the equipment's lifespan. Furthermore, manual cleaning makes it difficult to guarantee the uniformity of the cleaning effect, and residual stains may still cause errors in the surveying data, thus affecting the accuracy of engineering cost estimation and increasing the difficulty and cost of equipment maintenance.

[0004] Therefore, it is necessary to invent a field vertical and distance mapping device for construction project cost estimation to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a field vertical and distance surveying device for construction engineering cost estimation. It stores cleaning fluid in a storage tank. During cleaning, the angle of the surveying equipment is manually adjusted, and its bottom end contacts a spring accumulator, applying pressure to force the liquid to a reverse telescopic rod. This pushes the drive sleeve and swing arm to move, bringing the cleaning brush close to and contacting the lens. Simultaneously, the nozzle assembly sprays cleaning fluid, activating a micro-motor that drives the cleaning brush to rotate and clean the lens. Waste liquid flows through an inclined trough into a guide trough and is discharged. This method requires no complex operation; cleaning is completed simply by adjusting the angle. It quickly removes scale, ensures clear imaging, reduces surveying errors, and significantly improves efficiency and data accuracy, thus solving the problem of inconvenient lens cleaning in existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a field vertical and distance surveying device for construction engineering cost estimation, comprising a surveying device body, an angle adjustment component, and a support component. The top end of the surveying device body is rotatably connected to the angle adjustment component. Multiple support components are provided, and these multiple support components are annularly hinged to the surveying device body. The angle adjustment component includes a support base located at the top end of the surveying device body. An adjustment knob is provided on the outer wall of the support base. A rotating platform is rotatably connected to the top end of the support base. A driving bevel gear is provided at the bottom end of the rotating platform. Multiple driven bevel gears are meshed on the outer wall of the driving bevel gear. The bottom ends of the driven bevel gears are rotatably connected to the inner bottom wall of the surveying device body. A mounting frame is rotatably connected to the top end of the rotating platform. A surveying device is hinged to the inner cavity of the mounting frame. A reverse telescopic rod is provided at the top end of the mounting frame. A cleaning mechanism is connected to the power output end of the reverse telescopic rod, and one end of the cleaning mechanism abuts against the surveying device.

[0007] In a preferred embodiment of the present invention, the support assembly includes a support leg, one end of which is hinged to the inner cavity of the main body of the surveying device, and the other end of which is provided with a grounding pin. A positioning bracket is detachably connected to the outer side wall of the support leg, and an adjusting rod is connected to one side of the positioning bracket. The other end of the adjusting rod is hinged to the bottom of the main body of the surveying device.

[0008] In a preferred embodiment of the present invention, the inner cavity of the main body of the surveying device is provided with a rotating lead screw, both ends of which are rotatably connected to the inner top wall and inner bottom wall of the main body of the surveying device. A lifting sleeve is sleeved on the outer side wall of the rotating lead screw, the bottom end of which is hinged to one end of a plurality of support legs. The lifting sleeve is threadedly connected to a plurality of driven bevel gears. A hinged support is also provided on the outer side wall of the rotating lead screw, which is fixedly connected to the main body of the surveying device. The outer side wall of the hinged support is hinged to one end of a plurality of adjusting rods.

[0009] As a preferred embodiment of the present invention, the bottom end of the main body of the surveying device is provided with a snap-fit ​​base, and the snap-fit ​​base is provided with a snap-fit ​​groove.

[0010] As a preferred embodiment of the present invention, a plurality of strip-shaped anti-slip grooves are provided on the outer side wall of the support leg.

[0011] In a preferred embodiment of the present invention, a liquid storage tank is provided on the rotating platform, a feed inlet is provided at the top of the liquid storage tank, a sealing cap is provided on the feed inlet, the liquid storage tank is arc-shaped, a flexible tube is inserted into the top of the liquid storage tank, and a nozzle assembly is connected to the other end of the flexible tube.

[0012] In a preferred embodiment of the present invention, the cleaning mechanism includes a swing arm, one end of which is hinged to a mounting bracket. A drive sleeve is fitted on the outer side of the swing arm, and the side wall of the drive sleeve is hinged to the power output end of a reverse telescopic rod. A micro motor is mounted on the other end of the swing arm, and a cleaning brush is provided at the power output end of the micro motor. The cleaning brush abuts against the lens of the surveying equipment, and a slanted groove is provided at the lens of the surveying equipment. An infusion tube is inserted into the side wall of the micro motor, and the other end of the infusion tube is connected to the input end of the nozzle assembly.

[0013] As a preferred embodiment of the present invention, one end of the reverse telescopic rod is connected to a spring accumulator through a sealed pipe, and the inner cavity of the spring accumulator is provided with a spring assembly.

[0014] As a preferred embodiment of the present invention, the top of the mounting bracket is provided with a flow guide groove.

[0015] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This device stores cleaning fluid in a storage tank. When cleaning is needed, the surveying equipment is manually adjusted to rotate, and its bottom end contacts and applies pressure to the spring accumulator. This forces the fluid inside the spring accumulator into the reverse telescopic rod, using the pressure difference to extend the rod. This, in turn, moves the drive sleeve and the swing arm, bringing the cleaning brush at the other end of the swing arm closer to and into contact with the lens of the surveying equipment. Simultaneously, the cleaning fluid in the storage tank is sprayed out through the nozzle assembly, activating the micro motor to drive the cleaning brush to rotate and clean the lens. The waste fluid after cleaning flows into the guide trough through the inclined channel on the surveying equipment and is discharged. This cleaning method requires no additional complex operations, is simple to operate, and can be completed while adjusting the angle of the surveying equipment. It can quickly remove dirt from the lens, ensure clear imaging of the surveying equipment, reduce surveying errors caused by lens contamination, and significantly improve surveying efficiency and data accuracy.

[0016] 2. With waste liquid collection as its core, during the cleaning process, when the cleaning fluid and dirt flow down the inclined channel at the lens of the surveying equipment, they will flow directly into the guide channel at the top of the mounting frame. The guide channel can quickly collect and discharge the waste liquid to the outside of the device. This waste liquid collection method, with the cooperation of the inclined channel and the guide channel, can prevent the waste liquid after cleaning from flowing randomly inside the device, prevent the waste liquid from contaminating other parts of the surveying equipment and the surrounding environment, reduce equipment failure and maintenance costs caused by waste liquid residue, and at the same time keep the inside of the device clean, ensuring that the surveying work can proceed smoothly without being affected by waste liquid. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the main body of the surveying device of the present invention; Figure 3 This is a schematic diagram of the angle adjustment component of the present invention; Figure 4 This is a schematic diagram of the cleaning mechanism structure of the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the surveying equipment and the spring accumulator of the present invention; Figure 6 This is a schematic diagram of the inclined groove structure of the present invention; Figure 7 This is a schematic diagram of the micro motor and cleaning brush disc structure of the present invention; Figure 8 This is a schematic diagram of the internal cross-sectional structure of the reverse telescopic rod of the present invention; Figure 9 This is a schematic diagram of the liquid storage tank structure of the present invention; Figure 10 This is a schematic diagram of the spring accumulator structure of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Main body of the surveying device; 11. Rotating lead screw; 12. Lifting sleeve; 13. Hinge support; 14. Snap-fit ​​base; 2. Angle adjustment assembly; 21. Support base; 22. Rotary table; 220. Adjustment knob; 221. Driving bevel gear; 222. Driven bevel gear; 23. Mounting frame; 231. Guide channel; 24. Surveying equipment; 25. Reverse telescopic rod; 251. Spring accumulator; 26. Cleaning mechanism; 261. Swing arm; 262. Drive sleeve; 263. Micro motor; 264. Cleaning brush; 265. Infusion tube; 27. Nozzle assembly; 201. Storage tank; 3. Support assembly; 31. Support leg; 32. Grounding pin; 33. Adjustment rod; 34. Positioning clamp. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This invention provides, for example Figures 1-10 The illustrated device for on-site vertical and distance surveying in construction engineering cost estimation includes a main body 1, an angle adjustment component 2, and a support component 3. The top of the main body 1 is rotatably connected to the angle adjustment component 2. Multiple support components 3 are provided and are annularly hinged to the main body 1. The angle adjustment component 2 includes a support base 21 located at the top of the main body 1. An adjustment knob 220 is provided on the outer wall of the support base 21. A rotating platform 22 is rotatably connected to the top of the support base 21. A driving bevel gear 221 is provided at the bottom of the rotating platform 22. Multiple driven bevel teeth are meshed on the outer wall of the driving bevel gear 221. The bottom end of the driven bevel gear 222 is rotatably connected to the inner bottom wall of the main body 1 of the surveying device. The top end of the rotary table 22 is rotatably connected to the mounting frame 23. The inner cavity of the mounting frame 23 is hinged to the surveying equipment 24. The top end of the mounting frame 23 is provided with a reverse telescopic rod 25. The power output end of the reverse telescopic rod 25 is connected to a cleaning mechanism 26. One end of the cleaning mechanism 26 abuts against the surveying equipment 24. By setting the cooperative structure of the angle adjustment component 2 and the support component 3, the device can be adjusted at multiple angles and stably supported. At the same time, the integrated cleaning mechanism 26 can be used to conveniently clean the surveying equipment 24 during the surveying process, improving the continuity and efficiency of the surveying operation.

[0022] Furthermore, the support component 3 includes a support leg 31, one end of which is hinged to the inner cavity of the main body 1 of the surveying device, and the other end of which is provided with a grounding pin 32. A positioning bracket 34 is detachably connected to the outer wall of the support leg 31. An adjusting rod 33 is connected to one side of the positioning bracket 34, and the other end of the adjusting rod 33 is hinged to the bottom of the main body 1 of the surveying device. Through the combination structure of the support leg 31, the grounding pin 32 and the adjusting rod 33, the support angle and length can be flexibly adjusted, and the positioning bracket 34 can be used to achieve stable positioning, enhance the adaptability and support stability of the device in different terrains, and ensure the accuracy of the surveying data.

[0023] Furthermore, the inner cavity of the main body 1 of the surveying device is provided with a rotating lead screw 11. Both ends of the rotating lead screw 11 are rotatably connected to the inner top wall and inner bottom wall of the main body 1 of the surveying device. A lifting sleeve 12 is sleeved on the outer side wall of the rotating lead screw 11. The bottom end of the lifting sleeve 12 is hinged to one end of multiple support legs 31. The lifting sleeve 12 is threadedly connected to multiple driven bevel gears 222. A hinge support 13 is also provided on the outer side wall of the rotating lead screw 11. The hinge support 13 is fixedly connected to the main body 1 of the surveying device. The outer side wall of the hinge support 13 is hinged to one end of multiple adjusting rods 33. Through the threaded transmission structure of the rotating lead screw 11 and the lifting sleeve 12, multiple support legs 31 can be synchronously driven to unfold or retract. With the transmission of the driven bevel gears 222, linkage operation can be achieved, reducing manual adjustment steps and improving the unfolding efficiency and synchronicity of the support components 3.

[0024] Furthermore, the bottom of the main body 1 of the surveying device is provided with a snap-fit ​​base 14, and the snap-fit ​​base 14 is provided with a snap-fit ​​groove; through the snap-fit ​​groove structure of the snap-fit ​​base 14, the device can be quickly connected to external fasteners, increasing the installation and fixing methods of the device, making it suitable for various operating scenarios and improving the flexibility of the device.

[0025] Furthermore, multiple strip-shaped anti-slip grooves are provided on the outer side wall of the support leg 31; the strip-shaped anti-slip grooves increase the friction between the support leg 31 and the hand, making it easier to hold and operate the support leg 31 when manually adjusting it, avoiding slippage, and improving the convenience and safety of the adjustment process.

[0026] Furthermore, the rotary table 22 is equipped with a liquid storage tank 201, with a feed inlet at the top and a sealing cap on the feed inlet. The liquid storage tank 201 is arc-shaped, and a flexible tube is inserted into the top of the liquid storage tank 201. The other end of the flexible tube is connected to a nozzle assembly 27. Through the cooperation of the arc-shaped liquid storage tank 201 and the nozzle assembly 27, cleaning fluid can be stored and accurately delivered to the lens of the surveying equipment 24. The sealing cap design prevents the cleaning fluid from leaking, ensuring a stable supply of cleaning fluid and providing convenience for lens cleaning.

[0027] Furthermore, the cleaning mechanism 26 includes a swing arm 261, one end of which is hinged to the mounting bracket 23. A drive sleeve 262 is fitted onto the outer side of the swing arm 261, and the side wall of the drive sleeve 262 is hinged to the power output end of the reverse telescopic rod 25. A micro motor 263 is mounted on the other end of the swing arm 261, and a cleaning brush disc 264 is provided at the power output end of the micro motor 263. The cleaning brush disc 264 abuts against the lens of the surveying equipment 24, and the lens of the surveying equipment 24 is open. The device is equipped with an inclined groove, and an infusion tube 265 is inserted into the side wall of the micro motor 263. The other end of the infusion tube 265 is connected to the input end of the nozzle assembly 27. The swing arm 261 is driven to swing by the reverse telescopic rod 25, which in turn drives the cleaning brush 264 to rotate in conjunction with the micro motor 263. Combined with the cleaning fluid delivered by the infusion tube 265, the lens of the surveying equipment 24 can be cleaned efficiently. The inclined groove design facilitates the discharge of waste liquid, improves the cleaning effect and operation convenience, and ensures the imaging clarity of the surveying equipment 24.

[0028] Furthermore, one end of the reverse telescopic rod 25 is connected to a spring accumulator 251 through a sealed pipe. The inner cavity of the spring accumulator 251 is equipped with a spring assembly. Through the spring assembly structure of the spring accumulator 251, buffering and reset power can be provided during the extension and retraction of the reverse telescopic rod 25, ensuring the stable operation of the cleaning mechanism 26, reducing mechanical impact damage to the equipment, and extending the service life of the device.

[0029] Furthermore, the top of the mounting frame 23 is provided with a guide channel 231; the waste liquid generated during the cleaning process can be quickly discharged through the guide channel 231, avoiding the accumulation of waste liquid on the mounting frame 23 and contaminating the equipment parts, keeping the inside of the device clean and reducing maintenance costs.

[0030] Working principle: The first step is to manually rotate the adjustment knob 220. The adjustment knob 220 drives the active bevel gear 221 to rotate. The active bevel gear 221 rotates and multiple driven bevel gears 222 mesh with it. With the interaction between the threads, the driven bevel gears 222 drive the lifting sleeve 12 to move up and down, and drive multiple support components 3 to unfold. The second step is to lock and position the support leg 31 by using the positioning bracket 34. The support angle of the main body 1 of the surveying device can be adjusted by manually adjusting the extension and retraction of the adjusting rod 33 and the support leg 31. The personnel can ensure the levelness of the adjustment by observing the level. Then, multiple grounding pins 32 are plugged into the ground to form a stable support structure. Thirdly, before this step, cleaning fluid is injected into the inner cavity of the storage tank 201. When cleaning is required, the surveying equipment 24 is manually rotated. After the surveying equipment 24 is rotated and adjusted, the bottom end of the surveying equipment 24 contacts the spring accumulator 251 and applies pressure to the top end of the spring accumulator 251, causing the liquid inside the spring accumulator 251 to be squeezed into the reverse telescopic rod 25. The pressure difference of the liquid pushes the reverse telescopic rod 25 to extend. After the output end of the reverse telescopic rod 25 extends, it pushes the drive sleeve 262 and the swing arm 261 to move. One end of the swing arm 261 is hinged to the mounting bracket 23. The arm 261 swings at the hinge point, with the other end of the swing arm 261 close to the lens of the surveying equipment 24. At this time, the cleaning brush 264 is in contact with the lens surface. Before the micro motor 263 is started, the cleaning fluid in the reservoir 201 is delivered to multiple nozzles through the nozzle assembly 27 and sprayed out through the nozzles. Then the micro motor 263 is started, and the cleaning brush 264 is driven to rotate through the power output shaft of the micro motor 263, thereby cleaning and scraping the lens of the surveying equipment 24. This cleaning method is simple to operate. The lens can be cleaned by adjusting the angle of the surveying equipment 24, which improves the efficiency of personnel surveying. Fourth step: After the cleaning brush 264 scrapes off the dirt attached to the lens, the cleaning fluid and dirt flow into the guide channel 231 through the inclined channel set on the surveying equipment 24 and then out. After cleaning is completed, the surveying equipment 24 is manually adjusted. When the surveying equipment 24 is raised, the spring group in the inner cavity of the spring accumulator 251 is reset, which causes the pressure liquid in the inner cavity of the reverse telescopic rod 25 to be drawn back, and the cleaning brush 264 is moved away from the lens.

[0031] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for on-site vertical and distance measurement in construction engineering cost estimation, characterized in that: The device includes a main body (1), an angle adjustment component (2), and a support component (3). The top of the main body (1) is rotatably connected to the angle adjustment component (2). Multiple support components (3) are provided, and the multiple support components (3) are annularly hinged to the main body (1). The angle adjustment component (2) includes a support base (21), which is located at the top of the main body (1). An adjustment knob (220) is provided on the outer side wall of the support base (21). A rotating platform (22) is rotatably connected to the top of the support base (21). The bottom of the rotating platform (22) is provided with... There is an active bevel gear (221), and multiple driven bevel gears (222) are meshed on the outer side wall of the active bevel gear (221). The bottom end of the driven bevel gear (222) is rotatably connected to the inner bottom wall of the main body (1) of the surveying device. The top end of the rotary table (22) is rotatably connected to a mounting frame (23). The inner cavity of the mounting frame (23) is hinged to a surveying device (24). The top end of the mounting frame (23) is provided with a reverse telescopic rod (25). The power output end of the reverse telescopic rod (25) is connected to a cleaning mechanism (26). One end of the cleaning mechanism (26) abuts against the surveying device (24).

2. The on-site vertical and distance surveying device for construction engineering cost estimation according to claim 1, characterized in that: The support assembly (3) includes a support leg (31), one end of which is hinged to the inner cavity of the main body (1) of the surveying device, and the other end of which is provided with a grounding pin (32). A positioning bracket (34) is detachably connected to the outer wall of the support leg (31), and an adjusting rod (33) is connected to one side of the positioning bracket (34). The other end of the adjusting rod (33) is hinged to the bottom of the main body (1) of the surveying device.

3. The on-site vertical and distance mapping device for construction engineering cost estimation according to claim 1, characterized in that: The inner cavity of the main body (1) of the surveying device is provided with a rotating screw (11). Both ends of the rotating screw (11) are rotatably connected to the inner top wall and inner bottom wall of the main body (1) of the surveying device. A lifting sleeve (12) is sleeved on the outer side wall of the rotating screw (11). The bottom end of the lifting sleeve (12) is hinged to one end of a plurality of support legs (31). The lifting sleeve (12) is threadedly connected to a plurality of driven bevel gears (222). A hinge support (13) is also provided on the outer side wall of the rotating screw (11). The hinge support (13) is fixedly connected to the main body (1) of the surveying device. The outer side wall of the hinge support (13) is hinged to one end of a plurality of adjusting rods (33).

4. The on-site vertical and distance surveying device for construction engineering cost estimation according to claim 1, characterized in that: The bottom of the main body (1) of the surveying device is provided with a snap-fit ​​base (14), and the snap-fit ​​base (14) is provided with a snap-fit ​​groove.

5. The on-site vertical and distance surveying device for construction engineering cost estimation according to claim 2, characterized in that: Multiple strip-shaped anti-slip grooves are provided on the outer side wall of the support leg (31).

6. The on-site vertical and distance surveying device for construction engineering cost estimation according to claim 1, characterized in that: The rotating table (22) is provided with a liquid storage tank (201). The top of the liquid storage tank (201) is provided with a feed inlet. The feed inlet is provided with a sealing cap. The liquid storage tank (201) is arc-shaped. A hose is inserted into the top of the liquid storage tank (201). The other end of the hose is connected to a nozzle assembly (27).

7. The on-site vertical and distance surveying device for construction engineering cost estimation according to claim 6, characterized in that: The cleaning mechanism (26) includes a swing arm (261), one end of which is hinged to the mounting bracket (23). A drive sleeve (262) is fitted on the outer side of the swing arm (261). The side wall of the drive sleeve (262) is hinged to the power output end of the reverse telescopic rod (25). A micro motor (263) is installed on the other end of the swing arm (261). A cleaning brush disc (264) is provided at the power output end of the micro motor (263). The cleaning brush disc (264) abuts against the lens of the surveying equipment (24). A slanted groove is provided at the lens of the surveying equipment (24). An infusion tube (265) is inserted into the side wall of the micro motor (263). The other end of the infusion tube (265) is connected to the input end of the nozzle assembly (27).

8. The on-site vertical and distance surveying device for construction engineering cost estimation according to claim 7, characterized in that: One end of the reverse telescopic rod (25) is connected to a spring accumulator (251) through a sealed pipe, and the inner cavity of the spring accumulator (251) is provided with a spring assembly.

9. The on-site vertical and distance surveying device for construction engineering cost estimation according to claim 1, characterized in that: The top of the mounting bracket (23) is provided with a flow guide groove (231).

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